Display device

ABSTRACT

A display device includes a display component, a light source, a substrate, and a cabinet. The light source irradiates the display component with light. The light source is mounted to the substrate. The substrate is attached to the cabinet. The cabinet includes a positioning component that positions the substrate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation application of U.S. patent application Ser. No.14/154,336, which claims priority to Japanese Patent Application No.2013-014956 filed on Jan. 30, 2013. The entire disclosures of U.S.patent application Ser. No. 14/154,336 and Japanese Patent ApplicationNo. 2013-014956 are hereby incorporated herein by reference.

BACKGROUND

1. Field of the Invention

The present invention generally relates to a display device. Morespecifically, the present invention relates to a display deviceincluding a rear face side holding member to which a heat dissipationmember is attached.

2. Background Information

A display device including a rear face side holding member to which aheat dissipation member is attached is conventionally known (seeJapanese Laid-Open Patent Application Publication No. 2008-198398(Patent Literature 1), for example).

This Patent Literature 1 discloses a display device including a lightsource substrate on which is mounted an LED that irradiates a liquidcrystal panel (e.g., a display component) with light from a rear faceside, a base member (e.g., a heat dissipation member) that dissipatesheat from the LED, and a back panel that holds the liquid crystal panelfrom the rear face side. With this display device, the base member andthe back panel are positioned and fixed by being fastened together withnuts and bolts.

SUMMARY

It has been discovered that with the display device disclosed in PatentLiterature 1, since the base member and the back panel are positionedand fixed by being fastened together with nuts and bolts, the nuts andbolts increase the number of required parts, and the work entailed bytightening the nuts and bolts increases the number of assembly steps.

One object of the present disclosure is to provide a display device withwhich the number of parts and the number of assembly steps can bereduced.

In view of the state of the know technology, a display device includes adisplay component, a light source, a substrate, and a cabinet. The lightsource irradiates the display component with light. The light source ismounted to the substrate. The substrate is attached to the cabinet. Thecabinet includes a positioning component that positions the substrate.

Other objects, features, aspects and advantages of the presentdisclosure will become apparent to those skilled in the art from thefollowing detailed description, which, taken in conjunction with theannexed drawings, discloses a preferred embodiment of a display device.

BRIEF DESCRIPTION OF THE DRAWINGS

Referring now to the attached drawings which form a part of thisoriginal disclosure:

FIG. 1 is a front perspective view of a liquid crystal television set inaccordance with one embodiment;

FIG. 2 is a rear elevational view of the liquid crystal television setillustrated in FIG. 1;

FIG. 3 is a partial cross sectional view of the liquid crystaltelevision set, taken along line in FIG. 2;

FIG. 4 is an exploded perspective view of the liquid crystal televisionset, illustrating a rear frame, a plurality of heat sinks, a pluralityof light source substrates, a reflective sheet, and a plurality ofdiffusing lenses of the liquid crystal television set;

FIG. 5 is an enlarged, partial perspective view of the liquid crystaltelevision set, illustrating a state in which a heat sink has beenpositioned by a positioning component of the rear frame;

FIG. 6 is an enlarged, partial perspective view of the liquid crystaltelevision set, illustrating a state in which the heat sink illustratedin FIG. 5 has been removed;

FIG. 7 is a partial cross sectional view of the liquid crystaltelevision set, taken along VII-VII line in FIG. 5;

FIG. 8 is an enlarged, partial perspective view of the liquid crystaltelevision set, illustrating a state in which the heat sink has beenfixed to a hook of the rear frame;

FIG. 9 is an enlarged, partial perspective view of the liquid crystaltelevision set, illustrating a state in which the heat sink in FIG. 8has been removed;

FIG. 10 is a partial cross sectional view of the liquid crystaltelevision set, taken along X-X line in FIG. 8; and

FIG. 11 is an enlarged, partial perspective view of a positioningcomponent of a rear frame in accordance with a modification example ofthe embodiment.

DETAILED DESCRIPTION OF EMBODIMENTS

A selected embodiment will now be explained with reference to thedrawings. It will be apparent to those skilled in the art from thisdisclosure that the following descriptions of the embodiment areprovided for illustration only and not for the purpose of limiting theinvention as defined by the appended claims and their equivalents.

Referring to FIGS. 1 to 10, a liquid crystal television set 100 isillustrated in accordance with one embodiment. The liquid crystaltelevision set 100 is an example of the “display device” of the presentinvention.

As shown in FIGS. 1 and 2, the liquid crystal television set 100includes a display component 1, a front housing 2, and a stand member 3.The display component 1 has liquid crystal cells that display video. Thefront housing 2 is made of plastic and supports the display component 1from the front side (the arrow Y1 direction side). The stand member 3 ismade of plastic and supports the liquid crystal television set 100 frombelow (the arrow Z2 direction side). The front housing 2 is formed inthe shape of a frame that is rectangular as seen from the front (as seenfrom the arrow Y1 direction side). More specifically, a rectangularopening 2 a for exposing the display component 1 is provided near thecenter of the front housing 2. As shown in FIG. 3, the front housing 2is formed in a concave shape that is recessed forward (the arrow Y1direction).

As shown in FIGS. 2 to 4, the liquid crystal television set 100 includesa rear frame 4, a cover member 5, a plurality of (three in thisembodiment) heat sinks 6, a plurality of light sources 7, a plurality of(three in this embodiment) light source substrates 8, a plurality ofdiffusing lenses 9, and a reflective sheet 10. The rear frame 4 is madeof sheet metal and supports the display component 1 from the rear faceside (the arrow Y2 direction side). This rear frame 4 has a rectangularshape corresponding to the front housing 2. Also, the rear frame 4 isformed in a concave shape that is recessed rearward (the arrow Y2direction). The rear frame 4 is an example of the “holding member” orthe “rear face side holding member” of the present invention.

As shown in FIGS. 2 and 3, the cover member 5 is made of a plastic. Thecover member 5 has a rectangular shape that is smaller than the rearframe 4, and is attached to the rear face side (the arrow Y2 directionside) of the sheet metal rear frame 4. More specifically, a convexcomponent 41 that protrudes on the rear face side with respect to therear frame 4 is formed on the rear face of the rear frame 4. This convexcomponent 41 is disposed in an inverted U shape so as to surround therectangular region R near the center of the rear frame 4, as seen fromthe rear face side of the rear frame 4. The cover member 5 is attachedto the rear face of the rear frame 4 so as to cover the rectangularregion R configured on the inside of the convex component 41 disposed inthe inverted U shape. Various kinds of circuit board (not shown), suchas a power supply board or a signal processing board, are attached inthe rectangular region R on the rear face of the rear frame 4.

As shown in FIGS. 3 and 4, the heat sinks 6 are made of sheet metal. Theheat sinks 6 extend in the direction in which one side of the rear frameextends (the horizontal direction: the X direction). The heat sinks 6are disposed, spaced apart in the up and down direction (the Zdirection), on the front of the rear frame 4 (the face on the arrow Y1direction side). The light source substrates 8 are respectively disposedon the front of these three heat sinks 6. The light sources 7 aremounted on the light source substrates 8. The light sources 7 irradiatethe display component 1 with light from the rear face side (the arrow Y2direction side). The light sources 7 are made up of LEDs (light emittingdiodes) or the like. A plurality of the light sources 7 are mounted onthe front of each of the light source substrates 8 such that the lightsources 7 are spaced apart in the direction in which each of the lightsource substrates 8 extends (the X direction). The heat sinks 6 are anexample of the “heat dissipation member” of the present invention.

As shown in FIGS. 3 and 4, the diffusing lenses 9 respectively cover theplurality of light sources 7, and are attached to the front of the lightsource substrates 8 on the side where the plurality of light sources 7are mounted (the face on the arrow Y1 direction side). These diffusinglenses 9 are made of acrylic or another such plastic, and have thefunction of diffusing light emitted by the light sources 7 to thedisplay component 1 side (see the dotted arrows in FIG. 3). As shown inFIG. 3, concave components 9 a are provided near the center of thebottom face of the diffusing lenses 9 (at positions corresponding to thelight sources 7 on the front of the light source substrates 8). Thediffusing lenses 9 are provided with columnar bosses 9 b that extendfrom the bottom faces of the diffusing lenses 9 to the light sourcesubstrate 8 side. These bosses 9 b are adhesively bonded to the front ofthe light source substrates 8, thereby attaching the diffusing lenses 9at positions corresponding to the light sources 7 on the front of thelight source substrates 8.

Also, as shown in FIGS. 3 and 4, the reflective sheet 10 reflects lightfrom the light sources 7 to the display component 1 side. The reflectivesheet 10 is disposed between the light source substrates 8 and thediffusing lenses 9. This reflective sheet 10 has a shape that conformsto the rear frame 4 (a concave shape that is recessed to the arrow Y2direction side) in a state of being disposed on the front of the lightsource substrates 8. Various kinds of optical member (not shown), suchas a diffuser for further diffusing light diffused by the diffusinglenses 9 to the display component 1 side, are disposed between thereflective sheet 10 and the display component 1. A plurality of holes 10a corresponding to the plurality of LEDs 7 (diffusing lenses 9) areformed in the reflective sheet 10.

As shown in FIGS. 4 to 10, in this embodiment, the rear frame 4integrally includes positioning components 42 for positioning the heatsinks 6, and hooks 43 for fixing the heat sinks 6 positioned by thepositioning components 42. The hooks 43 are disposed on the oppositeside from the positioning components 42 (the arrow Z1 direction side)with respect to the heat sinks 6. The hooks 43 are an example of the“fixing component” of the present invention.

As shown in FIGS. 5 to 7, the positioning components 42 include contactcomponents 42 a and warping suppressors 42 b. The contact components 42a contact with the side end faces on the lower side (the arrow Z2direction side) of the sheet metal heat sinks 6. The warping suppressors42 b are formed on the front side (the arrow Y1 direction side) of thesheet metal heat sinks 6 and suppress warping of the sheet metal heatsinks 6 to the front side that is caused by heat from the light sources7. FIG. 5 is a detail view of the positioning components 42 formed nearthe center in the horizontal direction (the X direction) and near thecenter in the up and down direction (the Z direction) of the rear frame4. In FIG. 5, the reflective sheet 10 disposed on the front of the lightsource substrates 8 is not shown in order to simplify the description.The positioning components 42 that include the contact components 42 aand the warping suppressors 42 b are disposed at positions on the rearframe 4 corresponding to near the center of the heat sinks 6 in thehorizontal direction (the X direction).

Specifically, as shown in FIGS. 4 to 7, cut-outs 61 extending in thehorizontal direction are formed near the center of the heat sinks 6 inthe horizontal direction (the X direction: the lengthwise direction ofthe heat sinks 6). The contact components 42 a are disposed so as tocontact with the inner faces near both ends in the horizontal directionof the portion corresponding to the cut-outs 61 of the heat sinks 6. Thewarping suppressors 42 b are disposed on the front side (the arrow Y1direction side) near both ends in the horizontal direction of theportion corresponding to the cut-outs 61 of the heat sinks 6. Thecontact components 42 a and the warping suppressors 42 b are both formedin a flat shape extending in the longitudinal direction (the Ydirection) and the up and down direction (the Z direction).

More specifically, as shown in FIG. 7, the contact components 42 a areformed in a flat shape having a length L1 in the longitudinal direction(the Y direction) that is greater than the thickness t of the heat sinks6. The warping suppressors 42 b are formed in a flat shape having alength L2 in the longitudinal direction that is greater than the lengthL1 of the contact components 42 a in the longitudinal direction. Here,the warping suppressors 42 b are disposed higher than the upper ends ofthe contact components 42 a (the ends on the arrow Z1 direction side).Consequently, groove-shaped spaces S are formed between the end faces onthe rear frame 4 side (the arrow Y2 direction side) of the warpingsuppressors 42 b disposed above the upper ends of the contact components42 a, and the front face of the rear frame 4 (the face on the arrow Y1direction side), respectively. The areas near the lower ends of the heatsinks 6 where the light source substrates 8 are attached (the area nearthe ends on the arrow Z2 direction side) are inserted into thisgroove-shaped spaces S. The upper end faces of the warping suppressors42 b have sloped faces 42 c that slope upward from the rear frame 4toward the opposite side from the rear frame 4. These sloped faces 42 care provided so that the heat sinks 6 to which the light sourcesubstrates 8 have been attached can be easily inserted into thegroove-shaped spaces S in a state in which the heat sinks 6 have beeninclined forward with respect to the rear frame 4 (see the one-dot chainlines in FIG. 7). The arrow A in FIG. 7 indicates the attachmentdirection in which the heat sinks 6 to which the light source substrates8 have been attached to the front face of the rear frame 4. This arrow Ain FIG. 7 is the same as the arrow A in FIG. 10 (discussed below).

As shown in FIG. 4, in this embodiment, the positioning components 42that include the contact components 42 a and the warping suppressors 42b are disposed not only at the positions of the rear frame 4corresponding to near the center of the heat sinks 6 in the horizontaldirection (the X direction), but also at the positions of the rear frame4 corresponding to near both ends of the heat sinks 6 in the horizontaldirection. More specifically, two each of the positioning components 42(total of four) are disposed at the positions of the rear frame 4corresponding to near the center of the heat sinks 6 in the horizontaldirection, and at the positions of the rear frame 4 corresponding tonear the ends of the heat sinks 6 in the horizontal direction. Moreprecisely, the two positioning components 42 corresponding to near thecenter of the heat sinks 6 in the horizontal direction are disposedhigher (more on the arrow Z1 direction side) than the two positioningcomponents 42 corresponding to near the ends of the heat sinks 6 in thehorizontal direction by the dimension of the depth D (see FIGS. 5 and 7)of the cut-outs 61 in the heat sinks 6 in the up and down direction (theZ direction). The contact components 42 a of the two positioningcomponents 42 corresponding to near the ends of the heat sinks 6 in thehorizontal direction are configured so as to contact with the side endfaces on the lower side (the arrow Z2 direction side) near the ends ofthe heat sinks 6 in the horizontal direction. For example, as shown inFIG. 8, the contact component 42 a of the positioning component 42corresponding to near the end of the heat sink 6 on the arrow X2direction side contacts with the lower side end face near the end of theheat sink 6 on the arrow X2 direction side.

As shown in FIGS. 8 and 10, the heat sinks 6 each include a plurality ofupright components 62. The upright components 62 are erected on theopposite side of the heat sink 6 from the positioning component 42 (thearrow Z1 direction side), toward the opposite side from the rear frame 4(the arrow Y1 direction side). As shown in FIG. 10, the hooks 43 engagewith the upright components 62 of the heat sinks 6, respectively. Thehooks 43 can be bent and deformed in a direction (see the arrow B inFIG. 10) that intersects the attachment direction (see the arrow A inFIG. 10) when the upright components 62 of the heat sinks 6 positionedby the positioning components 42 are attached to the hooks 43. FIG. 8 isa detail view of the positioning components 42 and the hooks 43 disposednear the center of the rear frame 4 in the up and down direction (the Zdirection) and near the end on one side in the horizontal direction (thearrow X2 direction side). For the sake of simplicity, the reflectivesheet 10 disposed on the front of the light source substrates 8 is notshown in FIG. 8.

As shown in FIGS. 8 to 10, the hooks 43 each have a long portion 43 aand a short portion 43 b (e.g., a distal end portion). The long portions43 a are erected forward (the arrow Y1 direction side) with respect tothe rear frame 4. The short portions 43 b extend downward (the arrow Z2direction side) from the ends of the long portions 43 a on the oppositeside from the rear frame 4 (the arrow Y1 direction side), respectively.These long portions 43 a and the short portions 43 b are both formed ina flat shape. More specifically, the long portions 43 a are formed in aflat shape extending in the horizontal direction (the X direction) andin the longitudinal direction (the Y direction). The short portions 43 bare formed in a flat shape extending in the horizontal direction and inthe up and down direction (the Z direction). As shown in FIG. 8, thewidth W1 in the horizontal direction of the upright components 62 of theheat sinks 6 is greater than the width W2 of the hooks 43 (the longportions 43 a and the short portions 43 b) in the horizontal direction.As shown in FIG. 10, the long portions 43 a have a length L4 in thelongitudinal direction that is greater than the length L3 of the uprightcomponents 62 in the longitudinal direction. Also, the short portions 43b have a length L5 in the up and down direction that is greater than thethickness t of the upright components 62 (the thickness of the heatsinks 6). The long portions 43 a and the short portions 43 b aredisposed so as to be spaced slightly apart with respect to the uppersurfaces and front end faces of the upright components 62 in a state inwhich the heat sinks 6 have been attached to the rear frame 4.

As shown in FIG. 4, in this embodiment, the plurality of the positioningcomponents 42 and the plurality of the hooks 43 are provided in thehorizontal direction (the X direction). More specifically, two each ofthe positioning components 42 (total of four) are disposed at thepositions of the rear frame 4 corresponding to near the center of theheat sinks 6 in the horizontal direction, and at the positions of therear frame 4 corresponding to near the ends of the heat sinks 6 in thehorizontal direction. Two each of the hooks 43 (total of four) aredisposed between the positioning component 42 disposed farthest to theback in FIG. 4 (on the arrow X1 direction side) and the positioningcomponent 42 disposed the next farthest to the back, and between thepositioning component 42 disposed farthest to the front in FIG. 4 (onthe arrow X2 direction side) and the positioning component 42 disposedthe next farthest to the front.

As shown in FIGS. 4 to 10, in this embodiment the positioning components42 and the hooks 43 are each formed integrally with the rear frame 4 bycutting and lifting the sheet metal rear frame 4 on the heat sink 6 side(the arrow Y1 direction side). Consequently, holes 44 and 45 are formedin the portions of the rear frame 4 corresponding to the positioningcomponents 42 and the hooks 43, respectively. As shown in FIGS. 5 to 9,reinforcing ribs 42 d for reinforcing the positioning components 42 areintegrally formed near the center in the up and down direction (the Zdirection) of the boundary portion between the positioning components 42(contact components 42 a) and the rear frame 4. These reinforcing ribs42 d have been given a crinkle or texture finish near the center of theboundary portion of the positioning components 42 with the rear frame 4,and are formed so as to protrude from the hole 44 side toward theopposite side from the holes 44, with respect to the boundary portion ofthe positioning components 42 with the rear frame 4.

In this embodiment, as discussed above, the positioning components 42for positioning the heat sinks 6 and the hooks 43 for fixing the heatsinks 6 positioned by the positioning components 42 are formedintegrally with the rear frame 4. Thus, there is no need to separatelyprovide nuts, bolts, or other such parts for positioning and fixing theheat sinks 6 and the rear frame 4. Therefore, the number of parts andthe number of steps can be reduced correspondingly.

In this embodiment, as discussed above, the positioning components 42are provided with the contact components 42 a that contact with the sideend faces on the lower side (the arrow Z2 direction side) of the heatsinks 6, and the warping suppressors 42 b that are formed on the frontside (the arrow Y1 direction side) of the sheet metal heat sinks 6 andsuppress warping of the sheet metal heat sinks 6 to the front sidecaused by heat from the light sources 7. Consequently, even if heat fromthe light sources 7 should cause the heat sinks 6 to warp, warping ofthe heat sinks 6 can be suppressed by the warping suppressors 42 b,while the heat sinks 6 can be easily positioned by the contactcomponents 42 a.

In this embodiment, as discussed above, the positioning components 42that include the contact components 42 a and the warping suppressors 42b are disposed at positions of the rear frame 4 corresponding to nearthe center of the heat sinks 6 in the direction in which one side of therear frame 4 extends (the horizontal direction: the X direction).Consequently, the positioning components 42 that include the contactcomponents 42 a and the warping suppressors 42 b are disposed so as tocorrespond to the portion of the heat sinks 6 where the center ofgravity is located and where warping tends to occur (near the center).Thus, warping of the heat sinks 6 can be effectively suppressed whilethe heat sinks 6 can be stably positioned.

In this embodiment, as discussed above, the cut-outs 61 are formed nearthe center of the heat sinks 6 in the horizontal direction (the Xdirection: the lengthwise direction of the heat sinks 6). The contactcomponents 42 a are configured to contacts with the inner faces on thelower side (the arrow Z2 direction side) of the portion of the heatsinks 6 corresponding to the cut-outs 61. The warping suppressors 42 bare formed on the front side (the arrow Y1 direction side) of theportion of the heat sinks 6 corresponding to the cut-outs 61.Consequently, since the warping suppressors 42 b are disposed so as tocorrespond to the portion where warping tends to occur (the centerportion in the short-side direction of the heat sinks 6) on the insideby the depth D (see FIGS. 5 and 7) in the up and down direction (the Zdirection) of the cut-outs 61 with respect to the portion of the heatsinks 6 where the cut-outs 61 are not formed, warping of the heat sinks6 can be more effectively suppressed.

In this embodiment, as discussed above, the positioning components 42that include the contact components 42 a and the warping suppressors 42b are disposed not only at positions of the rear frame 4 correspondingto near the center of the heat sinks 6 in the horizontal direction (theX direction), but also at positions of the rear frame 4 corresponding tonear both ends of the heat sinks 6 in the horizontal direction.Consequently, the positioning components 42 that include the contactcomponents 42 a and the warping suppressors 42 b are disposed so as tocorrespond to near the ends of the heat sinks 6 in addition to near thecenter of the heat sinks 6. Thus, warping of the heat sinks 6 can bebetter suppressed, while the heat sinks 6 can be positioned more stably.

In this embodiment, as discussed above, the hooks 43 are disposed on theopposite side (the arrow Z1 direction side) from the positioningcomponents 42 with respect to the heat sinks 6. Consequently, unlikewhen the hooks 43 and the positioning components 42 are disposed on thesame side with respect to the heat sinks 6, the job of using thepositioning components 42 to position the heat sinks 6, and the job ofusing the hooks 43 to fix the heat sinks 6 can each be carried outseparately on one or the other side of the heat sinks 6. Thus, the jobsof positioning and fixing the heat sinks 6 can be performed moreefficiently.

In this embodiment, as discussed above, the heat sinks 6 are providedwith the upright components 62 erected on the opposite side (the arrowY1 direction side) from the rear frame 4, from the ends of the heatsinks 6 on the opposite side from the positioning components 42 (thearrow Z1 direction side). The hooks 43 engage with the uprightcomponents 62 of the heat sinks 6. The upright components 62 of the heatsinks 6 positioned by the positioning components 42 can be bent in adirection (see the arrow B in FIG. 10) that intersects the attachmentdirection (see the arrow A in FIG. 10) in which the upright components62 of the heat sinks 6 are attached to the hooks 43. Consequently, theheat sinks 6 can be securely fixed to the rear frame 4 by the hooks 43(made of sheet metal) that engage with the upright components 62 of theheat sinks 6. Also, even when the heat sinks 6 have been positioned inthe job of attaching the heat sinks 6 (the upright components 62) to therear frame 4 (the hooks 43), since the hooks 43 can be bent and deformedin a direction that intersects the attachment direction of the uprightcomponents 62, it is less likely that the job of attaching the heatsinks 6 to the rear frame 4 will be impeded by the hooks 43. As aresult, the heat sinks 6 can be attached easily and securely to the rearframe 4.

In this embodiment, as discussed above, the positioning components 42and the hooks 43 are each formed integrally with the sheet metal rearframe 4 by cutting and lifting the sheet metal rear frame 4.Consequently, it is a simple matter for the positioning components 42and the hooks 43 to be formed integrally with the sheet metal rear frame4, merely by cutting and lifting a part of the sheet metal rear frame 4.

In this embodiment, as discussed above, the plurality of each of thepositioning components 42 and the hooks 43 are provided in the direction(the X direction) in which the heat sinks 6 extend. Consequently, thepositioning and fixing of the heat sinks 6 can be carried out morereliably by means of the plurality of positioning components 42 andhooks 43 provided in the direction in which the heat sinks 6 extend.

The embodiment disclosed herein is just an example in every respect, andshould not be interpreted as being limiting in nature. The scope of theinvention being indicated by the appended claims rather than by theabove description of the embodiments, all modifications within themeaning and range of equivalency of the claims are included.

For example, in the above embodiment, the liquid crystal television set100 is used as an example of the display device of the presentinvention. However, the present invention is not limited to this.Besides the liquid crystal television set 100, the present invention canalso be applied to any normal display device, such as a PC (personalcomputer) display device.

Also, in the above embodiment, as shown in FIG. 6, the positioningcomponents 42 have the flat contact components 42 a and the warpingsuppressors 42 b extending in the up and down direction (the Zdirection) and the longitudinal direction (the Y direction). However,the present invention is not limited to this. As in the modificationexample shown in FIG. 11, positioning components 142 can each include acontact component 142 a and a warping suppressor 142 b. The contactcomponents 142 a extend in the longitudinal direction and the horizontaldirection (the X direction), while the warping suppressors 142 b extendin the horizontal direction and the up and down direction. Again in themodification example shown in FIG. 11, just as in the above embodiment,the positioning components 142 are formed integrally with a rear frame14 by cutting and lifting the sheet metal rear frame 14. In themodification example shown in FIG. 11, the warping suppressors 142 bhave a specific width W3 in the horizontal direction and are disposed soas to come into planar contact with the front surfaces (the faces on thearrow Y1 direction side) near the ends on the lower side (the arrow Z2direction side) of the heat sinks 6. Thus, warping of the heat sinks 6can be suppressed while the heat sinks 6 are securely held by beingsandwiched between the warping suppressors 142 b and the rear frame 14.The rear frame 14 is an example of the “holding member” or the “rearface side holding member” of the present invention.

Also, in the above embodiment, two each of the positioning components(total of four) are disposed so as to correspond to near the center andnear the ends of the heat sinks. However, the present invention is notlimited to this. The number of the positioning components disposed so asto correspond to near the center of the heat sinks can be one, or it canbe three or more. Similarly, the number of positioning componentsdisposed so as to correspond to near the ends of the heat sinks can beone, or it can be three or more. Also, positioning components can bedisposed so as to correspond to portions other than near the center andnear the ends of the heat sinks.

Also, in the above embodiment, the notches or cut-outs are provided nearthe center of the heat sinks. The positioning components correspondingto near the center of the heat sinks are disposed higher, by an amountequal to the depth of the notches in the up and down direction, than thepositioning components corresponding to near the ends of the heat sinks.However, the present invention is not limited to this. With the presentinvention, notches need not be provided to the heat sinks, andpositioning components corresponding to near the center of the heatsinks, and positioning components corresponding to near the ends of theheat sinks can be disposed at positions that are at the same height.

Also, in the above embodiment, the positioning components are disposedlower than the heat sinks. The hooks are disposed higher than the heatsinks. The positioning components and the hooks are disposed on mutuallyopposite sides of the heat sinks. However, the present invention is notlimited to this. With the present invention, the positions of thepositioning components and the hooks with respect to the heat sinks canbe reversed from that given above. Specifically, the positioningcomponents and the hooks can be provided higher and lower than the heatsinks, respectively. Also, with the present invention, the positioningcomponents and the hooks can be disposed on the same side with respectto the heat sinks.

Also, in the above embodiment, the upright components are provided tothe heat sinks. The hooks corresponding to the upright components areprovided to the rear frame. The heat sinks are fixed to the rear frameby engaging the upright components and the hooks with respect to eachother. However, the present invention is not limited to this. With thepresent invention, the heat sinks can be fixed to the rear frame byintegrally forming fixing means other than the hook structure with therear frame.

In the illustrated embodiment, the display device includes a displaycomponent, a light source, a light source substrate, a heat dissipationmember, and a holding member. The light source is disposed on a rearside of the display device with respect to the display component andirradiates the display component with light from the rear side. Thelight source is mounted to the light source substrate. The heatdissipation member is made of sheet metal. The light source substrate isattached the heat dissipation member. The heat dissipation memberdissipates heat from the light source. The holding member is made ofsheet metal. The heat dissipation member is attached to the holdingmember. The holding member holds the display component from the rearside. The holding member integrally includes a positioning component forpositioning the heat dissipation member, and a fixing component forfixing the heat dissipation member positioned by the positioningcomponent.

With this display device, as mentioned above, because the sheet metalholding member is configured so as to integrally include the positioningcomponent and the fixing component, there is no need to separatelyprovide nuts, bolts, or other such parts for positioning and fixing theheat dissipation member and the holding member. Thus, the number ofparts and the number of steps can be reduced correspondingly.

In the illustrated embodiment, with the display device, the positioningcomponent includes a contact component and a warping suppressor. Thecontact component contacts with a side end face of the heat dissipationmember. The warping suppressor is disposed on a front side of thedisplay device with respect to the heat dissipation member andsuppresses warping of the heat dissipation member towards the front sidedue to the heat from the light source. With this configuration, even ifheat from the light source should cause the heat dissipation member towarp, warping of the heat dissipation member can be suppressed by thewarping suppressor, while the heat dissipation member can be easilypositioned by the contact component.

In this case, the holding member can have a rectangular shape. The heatdissipation member can be formed so as to extend in a direction in whichone side of the rectangular holding member extends. The positioningcomponent can be located at a position of the holding membercorresponding to a position near or adjacent to a center of the heatdissipation member at least in the direction in which the one sideextends. With this configuration, the positioning component thatincludes the contact component and the warping suppressor is disposed soas to correspond to the portion of the heat dissipation member where thecenter of gravity is located and where warping tends to occur (near thecenter). Thus, warping of the heat dissipation member can be effectivelysuppressed while the heat dissipation member can be stably positioned.

With the display device in which the heat dissipation member is formedso as to extend in the direction in which one side of the holding memberextends, a cut-out can be formed near or adjacent to the center of theheat dissipation member in the direction in which the one side extends(lengthwise direction). The contact component of the positioningcomponent can contact with an inner face of the cut-out (e.g., a portionof the heat dissipation member corresponding to the cut-out). Thewarping suppressor of the positioning component can be disposed on thefront side with respect to the cut-out (e.g., a portion of the heatdissipation member corresponding to the cut-out). With thisconfiguration, the warping suppressor is disposed so as to correspond tothe portion where warping tends to occur (the center portion in theshort-side direction of the heat dissipation member) on the insidecorresponding to the depth of the cut-out with respect to the portion ofthe heat dissipation member where the cut-out is not formed. Thus,warping of the heat dissipation member can be more effectivelysuppressed.

With the display device in which the heat dissipation member is formedso as to extend in the direction in which one side of the holding memberextends, the holding member further includes additional positioningcomponents that are located at positions of the holding membercorresponding to positions near or adjacent to both ends of the heatdissipation member in the direction in which the one side extends,respectively. With this configuration, the positioning components (e.g.,the positioning component and the additional positioning components) aredisposed so as to correspond not only to near the center of the heatdissipation member, but also to near both ends of the heat dissipationmember. Thus, warping of the heat dissipation member can be bettersuppressed, while the heat dissipation member can be positioned morestably.

With this display device, the fixing component can be disposed on anopposite side from the positioning component with respect to the heatdissipation member. With this configuration, unlike when the fixingcomponent and the positioning component are disposed on the same sidewith respect to the heat dissipation member, the job of using thepositioning component to position the heat dissipation member, and thejob of using the fixing component to fix the heat dissipation member caneach be carried out separately on one or the other side of the heatdissipation member. Thus, the jobs of positioning and fixing the heatdissipation member can be performed more efficiently.

In this case, the heat dissipation member can includes an uprightcomponent that extends away from the holding member from an end portionof the heat dissipation member that is located opposite from an oppositeend portion of the heat dissipation member corresponding to thepositioning component. The fixing component can include a hook thatengages with the upright component of the heat dissipation member. Thehook can be bent in a direction that intersects an attachment directionof the heat dissipation member relative to the fixing component whilethe upright component is being attached to the fixing component. Withthis configuration, the heat dissipation member can be securely fixedwith respect to the holding member by the hook (made of sheet metal)that engages with the upright component of the heat dissipation member.Also, even when the heat dissipation member has been positioned duringattachment of the heat dissipation member (upright component) to theholding member (hook), since the hook can be bent and deformed in adirection that intersects the attachment direction of the uprightcomponent, it is less likely that the job of attaching the heatdissipation member to the holding member will be impeded by the hook. Asa result, the heat dissipation member can be attached easily andsecurely to the holding member.

With the display device, the positioning component and the fixingcomponent are integrally formed on the sheet metal holding member bycutting and lifting a sheet metal. With this configuration, it is asimple matter for the positioning component and the fixing component tobe formed integrally with the sheet metal holding member, merely bycutting and lifting a part of the sheet metal (or the sheet metalholding member).

With the display device, the holding member can have a rectangularshape. The holding member integrally includes a plurality of positioningcomponents and a plurality of fixing components. The heat dissipationmember can extend in a direction in which one side of the rectangularholding member extends. The plurality of the positioning components andthe plurality of the fixing components are arranged with respect to eachother in the direction in which the heat dissipation member extends.With this configuration, the positioning and fixing of the heatdissipation member can be carried out more reliably by means of theplurality of positioning components and the plurality of the fixingcomponents provided in the direction in which the heat dissipationmember extends.

With the display device, the contact component can have a firstdimension measured in a direction from the front side to the rear side.The warping suppressor can have a second dimension measured in thedirection from the front side to the rear side. The second dimensionbeing larger than the first dimension.

With the display device, the heat dissipation member can have athickness that is smaller than the first dimension of the contactcomponent.

With the display device, the upright component has a third dimensionmeasured in a direction from a front side of the display device to therear side. The hook has a fourth dimension measured in the directionfrom the front side to the rear side. The fourth dimension is largerthan the third dimension.

With the display device, the hook has a distal end portion that extendsin a direction that intersects the direction from the front side to therear side. The distal end portion has a fifth dimension measured in thedirection that intersects the direction from the front side to the rearside. The fifth dimension is larger than a thickness of the uprightcomponent.

With the present invention, as discussed above, the number of parts andthe number of steps can be reduced.

In accordance with a first aspect, a display device comprises: a displaycomponent; a light source disposed on a rear side of the display devicewith respect to the display component, the light source being configuredto irradiate the display component with light from the rear side; alight source substrate to which the light source is mounted; a heatdissipation member to which the light source substrate is attached, theheat dissipation member being made of sheet metal and configured todissipate heat from the light source; and a holding member to which theheat dissipation member is attached, the holding member being made ofsheet metal and holding the display component from the rear side, theholding member integrally including a positioning component and a fixingcomponent, the positioning component positioning the heat dissipationmember, the fixing component fixing the heat dissipation memberpositioned by the positioning component.

In accordance with a second aspect, with the display device according tothe first aspect, the positioning component includes a contact componentand a warping suppressor, the contact component contacting with a sideend face of the heat dissipation member, the warping suppressor beingdisposed on a front side of the display device with respect to the heatdissipation member, the warping suppressor being configured to suppresswarping of the heat dissipation member towards the front side due to theheat from the light source.

In accordance with a third aspect, with the display device according tothe second aspect, the holding member has a rectangular shape, the heatdissipation member extends in a direction in which one side of theholding member extends, and the positioning component is located at aposition of the holding member corresponding to a position adjacent to acenter of the heat dissipation member in the direction in which the oneside extends.

In accordance with a fourth aspect, with the display device according tothe third aspect, the heat dissipation member has a cut-out adjacent tothe center of the heat dissipation member in the direction in which theone side extends, the contact component of the positioning componentcontacts with an inner face of the cut-out, and the warping suppressorof the positioning component is disposed on the front side with respectto the cut-out.

In accordance with a fifth aspect, with the display device according tothe third aspect, the holding member further includes additionalpositioning components that are located at positions of the holdingmember corresponding to positions adjacent to both ends of the heatdissipation member in the direction in which the one side extends,respectively.

In accordance with a sixth aspect, with the display device according tothe first aspect, the fixing component is disposed on an opposite sidefrom the positioning component with respect to the heat dissipationmember.

In accordance with a seventh aspect, with the display device accordingto the sixth aspect, the heat dissipation member includes an uprightcomponent that extends away from the holding member from an end portionof the heat dissipation member that is located opposite from an oppositeend portion of the heat dissipation member corresponding to thepositioning component, and the fixing component includes a hook thatengages with the upright component of the heat dissipation member, thehook being configured to be bent in a direction that intersects anattachment direction of the heat dissipation member relative to thefixing component while the upright component is being attached to thefixing component.

In accordance with an eighth aspect, with the display device accordingto the first aspect, the positioning component and the fixing componentare integrally formed on the holding member by cutting and lifting asheet metal.

In accordance with a ninth aspect, with the display device according tothe first aspect, the holding member has a rectangular shape, theholding member integrally including a plurality of positioningcomponents and a plurality of fixing components, the heat dissipationmember extends in a direction in which one side of the holding memberextends, and the positioning components and the fixing components arearranged with respect to each other in the direction in which the heatdissipation member extends.

In accordance with a tenth aspect, with the display device according tothe second aspect, the contact component has a first dimension measuredin a direction from the front side to the rear side, and the warpingsuppressor has a second dimension measured in the direction from thefront side to the rear side, with the second dimension being larger thanthe first dimension.

In accordance with an eleventh aspect, with the display device accordingto the tenth aspect, the heat dissipation member has a thickness that issmaller than the first dimension of the contact component.

In accordance with a twelfth aspect, with the display device accordingto the seventh aspect, the upright component has a third dimensionmeasured in a direction from a front side of the display device to therear side, and the hook has a fourth dimension measured in the directionfrom the front side to the rear side, with the fourth dimension beinglarger than the third dimension.

In accordance with a thirteenth aspect, with the display deviceaccording to the twelfth aspect, the hook has a distal end portion thatextends in a direction that intersects the direction from the front sideto the rear side, the distal end portion having a fifth dimensionmeasured in the direction that intersects the direction from the frontside to the rear side, with the fifth dimension being larger than athickness of the upright component.

In understanding the scope of the present invention, the term“comprising” and its derivatives, as used herein, are intended to beopen ended terms that specify the presence of the stated features,elements, components, groups, integers, and/or steps, but do not excludethe presence of other unstated features, elements, components, groups,integers and/or steps. The foregoing also applies to words havingsimilar meanings such as the terms, “including”, “having” and theirderivatives. Also, the terms “part,” “section,” “portion,” “member” or“element” when used in the singular can have the dual meaning of asingle part or a plurality of parts unless otherwise stated.

As used herein, the following directional terms “forward”, “rearward”,“front”, “rear”, “up”, “down”, “above”, “below”, “upward”, “downward”,“top”, “bottom”, “side”, “vertical”, “horizontal”, “perpendicular” and“transverse” as well as any other similar directional terms refer tothose directions of a display device in an upright position.Accordingly, these directional terms, as utilized to describe thedisplay device should be interpreted relative to a display device in anupright position on a horizontal surface.

While only selected embodiments have been chosen to illustrate thepresent invention, it will be apparent to those skilled in the art fromthis disclosure that various changes and modifications can be madeherein without departing from the scope of the invention as defined inthe appended claims. For example, unless specifically stated otherwise,the size, shape, location or orientation of the various components canbe changed as needed and/or desired so long as the changes do notsubstantially affect their intended function. Unless specifically statedotherwise, components that are shown directly connected or contactingeach other can have intermediate structures disposed between them solong as the changes do not substantially affect their intended function.The functions of one element can be performed by two, and vice versaunless specifically stated otherwise. The structures and functions ofone embodiment can be adopted in another embodiment. It is not necessaryfor all advantages to be present in a particular embodiment at the sametime. Every feature which is unique from the prior art, alone or incombination with other features, also should be considered a separatedescription of further inventions by the applicant, including thestructural and/or functional concepts embodied by such feature(s). Thus,the foregoing descriptions of the embodiments according to the presentinvention are provided for illustration only, and not for the purpose oflimiting the invention as defined by the appended claims and theirequivalents.

What is claimed is:
 1. A display device comprising: a display component;a light source that irradiates the display component with light; asubstrate to which the light source is mounted; and a cabinet to whichthe substrate is attached, the cabinet including a positioning componentthat positions the substrate.
 2. The display device according to claim1, wherein the display component has a rectangular shape, and thesubstrate has a rectangular shape, a longitudinal direction of thesubstrate directing in a longitudinal direction of the displaycomponent.
 3. The display device according to claim 2, wherein thepositioning component is disposed near a long side of the substrate. 4.The display device according to claim 3, wherein the cabinet includes aplurality of positioning components disposed on both sides of thesubstrate, respectively.
 5. The display device according to claim 4,wherein the positioning components are disposed offset in thelongitudinal direction of the substrate.
 6. The display device accordingto claim 4, wherein the cabinet includes at least one positioningcomponent disposed on one side of the substrate and at least onepositioning component disposed on the other side of the substrate, thenumber of the at least one positioning component disposed on the oneside of the substrate being different from the number of the at leastone positioning component disposed on the other side of the substrate.7. The display device according to claim 4, further comprising a standthat supports the display device near an outer edge portion of thedisplay device that extends substantially parallel to the longitudinaldirection of the substrate, the cabinet includes at least onepositioning component disposed on one side of the substrate and at leastone positioning component disposed on the other side of the substrate,the one side of the substrate is closer to the outer edge portion of thedisplay device than the other side of the substrate, the number of theat least one positioning component disposed on the one side of thesubstrate being larger than the number of the at least one positioningcomponent disposed on the other side of the substrate.
 8. The displaydevice according to claim 2, wherein a distance from one end of thesubstrate to the light source in the longitudinal direction of thesubstrate is different from a distance from the one end of the substrateto the positioning component.
 9. The display device according to claim1, wherein the positioning component is integrally formed with thecabinet.
 10. The display device according to claim 9, wherein thepositioning component substantially perpendicularly protrudes from asurface of the cabinet over which the light source is arranged.
 11. Thedisplay device according to claim 1, wherein the positioning componenthas a larger dimension than the substrate in a direction perpendicularto a surface of the substrate to which the light source is mounted. 12.The display device according to claim 1, wherein the positioningcomponent includes a fixing component that fixes the substrate.
 13. Thedisplay device according to claim 2, wherein the light source includes alens, and the substrate has a wider width than the lens in a transversedirection of the substrate.
 14. The display device according to claim 2,wherein the substrate has a plurality of substrates arranged withrespect to each other in a transverse direction of the displaycomponent.
 15. The display device according to claim 14, wherein thecabinet includes a plurality of positioning components arranged relativeto the substrates, respectively, the positioning components beingsubstantially aligned in the transverse direction of the displaycomponent.
 16. The display device according to claim 2, wherein thepositioning component is located near a center portion of the cabinet inthe longitudinal direction of the display component.
 17. The displaydevice according to claim 2, wherein the cabinet includes a plurality ofpositioning components symmetrically arranged each other with respect toa center portion of the cabinet in the longitudinal direction of thedisplay component.
 18. The display device according to claim 1, whereinthe cabinet includes a recess component in a surface of the cabinet towhich the substrate is attached, and the positioning component isdisposed at a location other than the recess component.
 19. The displaydevice according to claim 18, wherein the recess component has twoportions parallely extending in a transverse direction of the displaycomponent and a portion extending in a longitudinal direction of thedisplay component between ends of the two portions, and the positioningcomponent is disposed inside an area formed by the two portions and theportion of the recess component.
 20. The display device according toclaim 19, further comprising a heat dissipation member that contactswith the substrate and the positioning component.